No abstract

Augered piles are used to reinforce the soil and connect to the foundation to ensure the sustainability of the project. This is an advanced method that can support large structures on soft ground. Augered piles are one of the most widely used structural solutions for foundations used by designers for high-rise buildings, in projects with heavy loads, bridge construction and for buildings located on soft soils. Due to their hability to withstand heavy loads without affecting neighboring buildings when constructing foundations, bored pile foundations are increasingly being used in civil, industrial, and bridge and road projects in Vietnam. Geotechnical conditions in Vietnam are mainly represented by soft soils, so many engineers are working to optimize the section of the augered pile to increase their bearing capacity. However, studies of augered piles capable of expanding the body of the pile to increase the bearing capacity along the side surface and reduce the volume of concrete have not been carried out. Investigation of the type of augered pile with the above characteristics is one of the most important tasks. The load on a augered pile, with widening along the body of the pile, increased from 15.4% to 20.8% compared to a conventional augered pile with the same total volume, and the same precipitation. The load on a augered pile with widening along the body of the pile increases from 15.4% to 20.8% compared to a conventional augered pile with the same volume of concrete. For augered piles with expansion along the body of a pile with the same outer diameter (D1200mm), as compared to conventional augered piles, the load decreased by 241 (tons), equal to 7.94%, but the volume of concrete decreased by 19.8 m3, which is equivalent to 37, 4%.